[PATCH] powerpc: Avoid code patching freed init sections

[Michael Neuling]

> > For stable I've marked this as v4.13+ since that's when we refactored
> > code-patching.c but it could go back even further than that. In
> > reality though, I think we can only hit this since the first
> > spectre/meltdown changes.
> 
> Which means it affects all maintained stable trees because the
> spectre/meltdown changes are backported.

Yep we this this on SLES12 SP3 

Mikey